So i need urgently. 15 points!
simplify b ( a + b ) - a ( a - b ).

a2 + 2 ab + b2
a2 - 2 ab + b2
- a2 + 2 ab + b2
- a2 - 2 ab - b2

Evaluate the expression for the given value of the variable 7a - 4a for a =8

Which point is a solution to y s 4x + 5?

Which description is represented by a discrete graph? kiley bought a platter for $19 and several matching bowls that were $8 each. what is the total cost before tax? the temperature at 9 a.m. was 83° f and is heating up at an average rate of 6°f per hour. what is the temperature x hours later? juan ate an egg with 78 calories and some cereal with 110 calories per serving for breakfast. what is the total amount of calories he consumed? a bottle contained 2,000 ml of liquid and is being poured out at an average rate of 300 ml per second. how much liquid is left in the bottle after x seconds?